What was found
FLT 1258, AUA-JFK. DIRTY SOCK SMELL ROW 10 AND 11 DURING APPROACH TO AIRPORT.; ACCOMPLISHED TSM 05-50-00-810-831A , IDENTIFICATION OF CAUSE OF CABIN ODOR . UNABLE TO DUPLICATE DIRTY SOCK SMELL W/ APU LR ENGINE AS BLEED SOURCES . INSPECTED APU COMPARTMENT NO CONTAMINATION NOTED. PERFORMED DECONTAMINATION OF BLEED DUCTING IAW AMM 36-12-00 & REPLACED RECIRC FILTERS REF 21-21-41, A/C OK FOR CONT SVC. NO EVIDENCE OF LEAKS ON WALKAROUND SUSPECT ODOR TO BE A MISCELLENOUS CABIN ODOR.